{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-52704", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-03-07T14:49:46.891Z", "datePublished": "2024-05-21T15:22:53.343Z", "dateUpdated": "2026-08-05T09:11:05.098Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:11:05.098Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfreezer,umh: Fix call_usermode_helper_exec() vs SIGKILL\n\nTetsuo-San noted that commit f5d39b020809 (\"freezer,sched: Rewrite\ncore freezer logic\") broke call_usermodehelper_exec() for the KILLABLE\ncase.\n\nSpecifically it was missed that the second, unconditional,\nwait_for_completion() was not optional and ensures the on-stack\ncompletion is unused before going out-of-scope." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The bug is reachable only through call_usermodehelper_exec() with UMH_KILLABLE, used solely by request_module()/call_modprobe; an unprivileged local attacker triggers this via syscalls such as socket() that autoload net-pf-* modules, then sends SIGKILL to the waiting process.\nAC:L - The attacker controls both sides of the race by triggering request_module and delivering SIGKILL to their own process while it waits for modprobe, and can retry until umh_complete() completes the on-stack completion after the waiter has returned.\nPR:L - Module autoload via request_module() does not require CAP_SYS_MODULE; an ordinary unprivileged user can invoke it through socket() and many other unprivileged entry points with no elevated capabilities.\nUI:N - Exploitation requires no action from another user; the attacker alone triggers module autoload and signals their own process.\nS:U - Impact is confined to the local kernel's security authority (kernel memory corruption / privilege escalation); it does not cross a VM, IOMMU, or other security boundary.\nC:H - The bug is a use-after-free of an on-stack completion: umh_complete()/complete() operates on freed stack memory, which is memory corruption that can be leveraged for information disclosure under the UAF impact model.\nI:H - complete() writes to the freed stack completion (lock and done fields), corrupting the live or reused kernel stack and enabling control-flow hijacking / arbitrary integrity impact.\nA:H - The stack UAF causes kernel warnings/oopses (as seen in the syzbot lockdep crash in umh_complete) and can panic or hang the system." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/umh.c" ], "versions": [ { "version": "f5d39b020809146cc28e6e73369bf8065e0310aa", "lessThan": "7f9f6c54da876b3f0bece2b569456ceb96965ed7", "status": "affected", "versionType": "git" }, { "version": "f5d39b020809146cc28e6e73369bf8065e0310aa", "lessThan": "eedeb787ebb53de5c5dcf7b7b39d01bf1b0f037d", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/umh.c" ], "versions": [ { "version": "6.1", "status": "affected" }, { "version": "0", "lessThan": "6.1", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.13", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.1.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/7f9f6c54da876b3f0bece2b569456ceb96965ed7" }, { "url": "https://git.kernel.org/stable/c/eedeb787ebb53de5c5dcf7b7b39d01bf1b0f037d" } ], "title": "freezer,umh: Fix call_usermode_helper_exec() vs SIGKILL", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "problemTypes": [ { "descriptions": [ { "type": "CWE", "lang": "en", "description": "CWE-noinfo Not enough information" } ] } ], "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "timestamp": "2024-05-29T17:51:26.143724Z", "id": "CVE-2023-52704", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-10-31T20:11:31.465Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T23:11:35.365Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/7f9f6c54da876b3f0bece2b569456ceb96965ed7", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/eedeb787ebb53de5c5dcf7b7b39d01bf1b0f037d", "tags": [ "x_transferred" ] } ] } ] } }